OMER, EXCALIBUR KEVLAR All Spearguns >>> Spearguns by OMER More details and ordering info. This barrel on this gun is round, cross-sectioned, and made of Kevlar. In terms of performance this gun is extremely light, highly resistant to mechanical and environmental stress. Designed for 16 mm. rubber. User input on EXCALIBUR KEVLAR by OMER: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines